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sel4: free up top root directory of processes

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Issue #2514
This commit is contained in:
Alexander Boettcher 2017-09-06 13:39:57 +02:00 committed by Christian Helmuth
parent 675e2f062a
commit 013efb58ac
5 changed files with 49 additions and 5 deletions
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6
repos/base-sel4/src/core/include/platform_pd.h
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@ -37,8 +37,7 @@ class Genode::Platform_pd : public Address_space
Page_table_registry _page_table_registry;
Cap_sel const _page_directory_sel;
addr_t _init_page_directory();
addr_t const _page_directory = _init_page_directory();
addr_t const _page_directory;
Vm_space _vm_space;
@ -64,6 +63,9 @@ class Genode::Platform_pd : public Address_space
Cap_sel alloc_sel();
void free_sel(Cap_sel sel);
addr_t _init_page_directory() const;
void _deinit_page_directory(addr_t) const;
public:
/**

3
repos/base-sel4/src/core/platform_pd.cc
View File

@ -251,4 +251,7 @@ Platform_pd::~Platform_pd()
_cspace_cnode_1st.destruct(*platform()->ram_alloc(), true);
platform_specific()->core_sel_alloc().free(_cspace_cnode_1st.sel());
_deinit_page_directory(_page_directory);
platform_specific()->core_sel_alloc().free(_page_directory_sel);
}

15
repos/base-sel4/src/core/spec/arm/platform.cc
View File

@ -74,7 +74,7 @@ void Genode::Platform::_init_core_page_table_registry()
log(":phys_mem_16k: ", phys_alloc_16k());
}
Genode::addr_t Genode::Platform_pd::_init_page_directory()
Genode::addr_t Genode::Platform_pd::_init_page_directory() const
{
/* page directory table contains 4096 elements of 32bits -> 16k required */
enum { PAGES_16K = (1UL << Page_directory_kobj::SIZE_LOG2) / 4096 };
@ -94,3 +94,16 @@ Genode::addr_t Genode::Platform_pd::_init_page_directory()
return phys_addr;
}
void Genode::Platform_pd::_deinit_page_directory(addr_t phys_addr) const
{
int ret = seL4_CNode_Delete(seL4_CapInitThreadCNode,
_page_directory_sel.value(), 32);
if (ret != seL4_NoError) {
error(__FUNCTION__, ": could not free ASID entry, "
"leaking physical memory ", ret);
return;
}
Untyped_memory::free_page(phys_alloc_16k(), phys_addr);
}

15
repos/base-sel4/src/core/spec/x86_32/platform_pd.cc
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@ -16,7 +16,7 @@
#include "arch_kernel_object.h"
Genode::addr_t Genode::Platform_pd::_init_page_directory()
Genode::addr_t Genode::Platform_pd::_init_page_directory() const
{
addr_t const phys_addr = Untyped_memory::alloc_page(*platform()->ram_alloc());
seL4_Untyped const service = Untyped_memory::untyped_sel(phys_addr).value();
@ -33,3 +33,16 @@ Genode::addr_t Genode::Platform_pd::_init_page_directory()
return phys_addr;
}
void Genode::Platform_pd::_deinit_page_directory(addr_t phys_addr) const
{
int ret = seL4_CNode_Delete(seL4_CapInitThreadCNode,
_page_directory_sel.value(), 32);
if (ret != seL4_NoError) {
error(__FUNCTION__, ": could not free ASID entry, "
"leaking physical memory ", ret);
return;
}
Untyped_memory::free_page(*platform()->ram_alloc(), phys_addr);
}

15
repos/base-sel4/src/core/spec/x86_64/platform_pd.cc
View File

@ -16,7 +16,7 @@
#include "arch_kernel_object.h"
Genode::addr_t Genode::Platform_pd::_init_page_directory()
Genode::addr_t Genode::Platform_pd::_init_page_directory() const
{
addr_t const phys_addr = Untyped_memory::alloc_page(*platform()->ram_alloc());
seL4_Untyped const service = Untyped_memory::untyped_sel(phys_addr).value();
@ -32,3 +32,16 @@ Genode::addr_t Genode::Platform_pd::_init_page_directory()
return phys_addr;
}
void Genode::Platform_pd::_deinit_page_directory(addr_t phys_addr) const
{
int ret = seL4_CNode_Delete(seL4_CapInitThreadCNode,
_page_directory_sel.value(), 32);
if (ret != seL4_NoError) {
error(__FUNCTION__, ": could not free ASID entry, "
"leaking physical memory ", ret);
return;
}
Untyped_memory::free_page(*platform()->ram_alloc(), phys_addr);
}